What is the effect of the narrator's description of the uncle reading the aunt's letter? It adds surprise for readers of what the family learns about Great-Aunt Gertrude and her life. It provides readers with a complete picture of the uncle's character. It reveals the real reason why Great-Aunt-Gertrude moved to the United States to be near family. It adds mystery for readers as to the real reason why the uncle accompanies the mother and the narrator to Slovakia.